2129997 has 8 divisors (see below), whose sum is σ = 2882656. Its totient is φ = 1398672.

The previous prime is 2129983. The next prime is 2130001. The reversal of 2129997 is 7999212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2129997 - 2⁸ = 2129741 is a prime.

It is a d-powerful number, because it can be written as 2¹⁵ + 1 + 2²¹ + 9 + 9 + 9 + 7² .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2129977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5098 + ... + 5499.

It is an arithmetic number, because the mean of its divisors is an integer number (360332).

2^2129997 is an apocalyptic number.

It is an amenable number.

2129997 is a deficient number, since it is larger than the sum of its proper divisors (752659).

2129997 is a wasteful number, since it uses less digits than its factorization.

2129997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10667.

The product of its digits is 20412, while the sum is 39.

The square root of 2129997 is about 1459.4509241492. The cubic root of 2129997 is about 128.6647747163.

The spelling of 2129997 in words is "two million, one hundred twenty-nine thousand, nine hundred ninety-seven".